// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using System;
using System.IO;
using SharpCifs.Util;
using SharpCifs.Util.Sharpen;

namespace SharpCifs.Dcerpc
{

    public class DcerpcException : IOException
    {
        internal static string GetMessageByDcerpcError(int errcode)
        {
            int min = 0;
            int max = DcerpcError.DcerpcFaultCodes.Length;
            while (max >= min)
            {
                int mid = (min + max) / 2;
                if (errcode > DcerpcError.DcerpcFaultCodes[mid])
                {
                    min = mid + 1;
                }
                else
                {
                    if (errcode < DcerpcError.DcerpcFaultCodes[mid])
                    {
                        max = mid - 1;
                    }
                    else
                    {
                        return DcerpcError.DcerpcFaultMessages[mid];
                    }
                }
            }
            return "0x" + Hexdump.ToHexString(errcode, 8);
        }

        private int _error;

        private Exception _rootCause;

        internal DcerpcException(int error) : base(GetMessageByDcerpcError(error))
        {
            this._error = error;
        }

        public DcerpcException(string msg) : base(msg)
        {
        }

        public DcerpcException(string msg, Exception rootCause) : base(msg, rootCause)
        {
            this._rootCause = rootCause;
        }

        public virtual int GetErrorCode()
        {
            return _error;
        }

        public virtual Exception GetRootCause()
        {
            return _rootCause;
        }

        public override string ToString()
        {
            if (_rootCause != null)
            {
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                Runtime.PrintStackTrace(_rootCause, pw);
                return base.ToString() + "\n" + sw;
            }
            return base.ToString();
        }
    }
}
